Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26f0835abf405b7…

MALICIOUS

PDF

57.5 KB Created: 2020-08-23 12:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a237e7819d2b5d60783dd6a01eef692 SHA-1: d77ee3fd65af2818eee72873905d626d13c5f98d SHA-256: c26f0835abf405b75bd7bbd0db5618f80f60333c6d977746bbe6349c06c36cb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bleach+brave+souls+apk+9.+0.+4', which is also flagged as malicious. This suggests the document's primary purpose is to redirect users to a harmful site, likely for phishing or malware delivery. The presence of numerous other PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating an attempt to game search engine results for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bleach+brave+souls+apk+9.+0.+4 In PDF document text
    • http://nijali.summitstudyabroad.com/uploads/1/3/2/6/132682697/lapasugipuvova.pdfIn PDF document text
    • http://files.solarplexusbeauty.com/uploads/1/3/1/6/131637186/kepitiwix_fameran.pdfIn PDF document text
    • http://files.f-y-t-a.com/uploads/1/3/0/8/130814411/vebiluren.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/43269627904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/watermark_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8371/8042/files/bojosologajiribebojofovad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/35695834193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/xidilopakodukorazepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/83078171431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4798/3006/files/75726787097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8217/7946/files/donusewemarud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/jazobadaguferixodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/66732313873.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: f-y-t-a.com 4 samples

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006db5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6DB5 12144 bytes
SHA-256: 76a18e2110d76f795070fa293de7caa4a55496129a330d2b3887851f40ae409d
font_00_sfnt_off00005a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2D 5752 bytes
SHA-256: 99c368de1873a26b2137d7d373c1a3c4294effbb8f6897b43296443f090e99d3
font_02_sfnt_off00009014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9014 15804 bytes
SHA-256: bcc3ee93a7e5fbec0922c7ec1008a7ba29e2cf2a5dcbef4064d75b6dbcceca9c
font_03_sfnt_off0000c143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC143 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15